JP2021513828A - motor - Google Patents

Abstract

The present invention includes a housing; a stator arranged in the housing; a rotor arranged in the stator; a shaft coupled to the rotor; and a bus bar arranged on the stator and having a plurality of terminals. The terminal includes a neutral terminal and a plurality of phase terminals, the neutral terminal having a first body having a first radial width larger than a second width in the axial direction and a plurality of first bodies extending from the first body. The phase terminal may provide a motor that includes a second body having a first radial width smaller than a second axial width and a plurality of second connections extending from the second body. it can. [Selection diagram] Fig. 3

Description

The embodiment relates to a motor.

The electric steering device (EPS) is a device that enables safe driving for the driver by guaranteeing the turning stability of the vehicle and providing a quick stability. Such an electric steering device drives a motor through an electronic control unit (ECU) according to operating conditions sensed by a vehicle speed sensor, a torque angle sensor, a torque sensor, or the like to control the steering axis of the vehicle. Control the drive.

The motor includes a rotor and a stator. A coil is wound around the stator. The connecting stage of the coil wound around the stator can be connected to the busbar. The busbar includes the fuselage and terminal. The terminal is connected to the coil. The terminal includes a fuselage and multiple connections extending from the fuselage. The fuselage of the terminal generally includes a curved surface, and the connecting portion is in the form of a branch from such a fuselage. The terminal can be manufactured by punching a sheet metal material in the pattern of the development drawing, but such a terminal shape has a problem that a large amount of scrap is generated.

The embodiment is for solving the above-mentioned problem, and is an object to solve the problem of providing a motor including a terminal that generates less scrap in the manufacturing process.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned here will be clearly understood by those skilled in the art from the following description.

An embodiment includes a housing, a stator arranged in the housing, a rotor arranged in the stator, a shaft coupled to the rotor, and a bus bar arranged on the stator and having a plurality of terminals. The plurality of terminals include a neutral terminal and a plurality of phase terminals, and the neutral terminal includes a first body having a first radial width larger than a second width in the axial direction and a plurality of extending from the first body. The phase terminal includes a second body whose first width in the radial width is smaller than the second width in the axial direction, and a motor including a plurality of second connecting parts extending from the second body. Can be provided.

Preferably, the first width of the neutral terminal can be the same as the second width of the phase terminal, and the second width of the neutral terminal can be the same as the first width of the phase terminal.

Preferably, the axial width of the first connecting portion of the neutral terminal can be the same as the radial width of the second connecting portion of the phase terminal.

Preferably, with respect to the center of the bus bar, the first body or the second body is arranged in the first or second orbit, and the plurality of phase terminals are the first phase terminal, the second phase terminal and the like. The second body of the first phase terminal and the second body of the third phase terminal are arranged on the first orbit, and the second body of the second phase terminal includes the second orbit, including the third phase terminal. Can be placed on top.

Preferably, the first orbit can be located inside the second orbit with respect to the center of the busbar.

Preferably, the first body of the neutral terminal can be placed on the second orbit.

Preferably, the second connecting portion comprises a horizontal portion extending from one side of the second body, a vertical portion extending upward from a portion of the horizontal portion, and a terminal protruding from a portion of the vertical portion. It can be coupled with the coil of the stator.

Preferably, the terminal of any one of the first phase terminal, the second phase terminal and the third phase terminal is of the two terminals of the other phase terminal in the circumferential direction. Can be placed in between.

Preferably, the two terminals of the first phase terminal can be arranged so as to be asymmetric with respect to a virtual straight line connecting the center of the first orbit and the center of the second body of the first phase terminal.

Preferably, the two terminals of the second phase terminal can be arranged symmetrically with respect to a virtual straight line connecting the center of the first orbit and the center of the second body of the second phase terminal.

Preferably, the radial length from the center of the bus bar to the first body of the neutral terminal may be greater than the radial length of the phase terminal to the second body.

According to the embodiment, the terminal includes a terminal that generates less scrap in the manufacturing process, and provides an advantageous effect of significantly reducing the manufacturing cost.

A side sectional view of the motor according to the embodiment. A drawing illustrating a busbar. The perspective view which illustrated the terminal of the bus bar which was illustrated in FIG. The plan view of the terminal illustrated in FIG. The perspective view which illustrated the neutral terminal. The drawing which illustrated the raw material of the phase terminal which has the development pattern of a phase terminal. The drawing which illustrated the phase 1 terminal. FIG. 7 is a plan view of the first phase terminal illustrated in FIG. 7. The perspective view which illustrated the phase 2 terminal. The plan view of the phase 2 terminal illustrated in FIG. The perspective view which illustrated the phase 3 terminal. The plan view of the phase 3 terminal illustrated in FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Objectives, particular advantages and novel features of the present invention will become even more apparent from the following detailed description and preferred examples associated with the accompanying drawings. In the description of the present invention, detailed description of related known techniques that may unnecessarily obscure the gist of the present invention will be omitted.

Terms including ordinal numbers, such as second, first, etc., can be used to describe various components, but the components are not limited by the terms. The term is used only to distinguish one component from the other. For example, the second component can be named the first component without departing from the scope of rights of the present invention, and similarly the first component can be named the second component. The terms and / or include any combination of a plurality of related described items or one of a plurality of related described items.

FIG. 1 is a side sectional view of the motor according to the embodiment.

Referring to FIG. 1, the motor according to the embodiment can include a shaft 10, a rotor 20, a stator 30, and a bus bar 40.

The shaft 10 may be coupled to the rotor 20. When an electromagnetic interaction occurs between the rotor 20 and the stator 30 through the supply of electric current, the rotor 20 rotates, and the shaft 10 rotates in conjunction with this. The shaft 10 is connected to the steering shaft of the vehicle and can transmit power to the steering shaft.

The rotor 20 rotates through electrical interaction with the stator 30.

The rotor 20 can include a rotor core and a magnet. The rotor core may be implemented in the form of a stack of plates in the form of circular thin steel plates or in the form of a single cylinder. A hole to which the shaft 10 is connected may be arranged at the center of the rotor core. A protrusion that guides the magnet may protrude from the outer peripheral surface of the rotor core. The magnet can be attached to the outer peripheral surface of the rotor core. The plurality of magnets may be arranged along the circumference of the rotor core at regular intervals. The rotor 20 can include a can member that surrounds the magnet and fixes the magnet so that it does not separate from the rotor core and prevents the magnet from being exposed.

The stator 30 may have a coil 31 wound around it to induce an electrical interaction with the rotor 20. The specific configuration of the stator 30 for winding the coil 31 is as follows. The stator 30 can include a stator core containing a plurality of teeth. The stator core may be provided with an annular yoke portion and may be provided with teeth around which the coil is wound from the yoke in the central direction. Teeth may be provided at regular intervals along the outer peripheral surface of the yoke portion. An insulator 32 is attached to the teeth. The coil 31 is wound on the insulator 32. On the other hand, the stator core can be formed by laminating a plurality of plates in the form of thin steel plates with each other. Further, the stator core may be formed by connecting or connecting a plurality of divided cores to each other.

FIG. 2 is a drawing illustrating a bus bar.

With reference to FIGS. 1 and 2, the bus bar 40 may be located on the stator 30. The bus bar 40 may include a terminal 100 inside an annular fuselage 41. The terminal of the bus bar 40 may include a phase terminal (120 in FIG. 3) connected to the U, V, and W phase power supplies and a neutral terminal (110 in FIG. 3) electrically connected to the phase terminal 120. it can.

The housing 50 can accommodate the rotor 20 and the stator 30 inside.

The sensing magnet 60 is coupled to the shaft 10 so as to interlock with the rotor 20. The sensing magnet 60 is a device for detecting the position of the rotor 20.

A sensor that senses the magnetic force of the sensing magnet 60 may be arranged on the circuit board 70. At this time, the sensor may be a Hall IC. The sensor detects changes in the north and south poles of the sensing magnet 60 and generates a sensing signal.

FIG. 3 is a perspective view showing the terminal of the bus bar shown in FIG. 2, and FIG. 4 is a plan view of the terminal shown in FIG.

With reference to FIGS. 3 and 4, the bus bar 40 includes a fuselage 41 and a terminal 100. The body 41 is a molded product formed through injection molding. The fuselage 41 includes a hole 41a in the center. The terminal 100 is arranged inside the body 41, and a part of the end portion of the terminal 100 is arranged so as to be exposed from the body 41. The fuselage 41 can be generally annular. The fuselage 41 can include a plurality of through holes 41b. The plurality of through holes 41b may be arranged at regular intervals along the circumferential direction of the body 41. Below the through hole 41b, the connecting stage of the coil 31 penetrates the through hole 41b. The position of the through hole 41b corresponds to the position of the terminal 112c of the neutral terminal 110 and the terminal 122c of the phase terminal 120. The terminal 122c is arranged directly above the through hole. The terminal 122c is a place where the connecting stage of the coil 31 penetrating the through hole 41b is fused and electrically connected.

The terminal 100 includes a neutral terminal 110 and a phase terminal 120. For example, the terminal 100 can include one neutral terminal 110 and three phase terminals 120. The three phase terminals 120 are connected to the coil 31 and are connected to the external power supplies of the U, V, and W phases.

FIG. 5 is a perspective view illustrating the neutral terminal.

Referring to FIGS. 4 and 5, the neutral terminal 110 includes a first body 111 and a plurality of first connecting portions 112. The first body 111 has an arc shape. The plurality of first connecting portions 112 have a form extending from the inner peripheral surface of the first body 111. The first connecting portion 112 includes a horizontal portion 112a, a vertical portion 112b, and a terminal 112c. The horizontal portion 112a is branched from the inner peripheral surface of the first body 111. Then, the vertical portion 112b is bent vertically upward from the horizontal portion 112a. The terminal 112c is bent at the vertical portion 112b. The terminal 112c is a portion connected to the coil 31. The cross section of the first body 111 of the neutral terminal 110 has a second width t1 in the axial direction smaller than the first width w1 in the radial direction when AA in FIG. 5 is used as a reference. The neutral terminal 110 is a terminal 100 in the form of lying horizontally. In the case of the neutral terminal 110, since there are many terminals 112c, the first body 111 can be manufactured immediately from the sheet metal without bending the first body 111.

FIG. 6 is a drawing illustrating the raw material of the phase terminal having the expansion pattern of the phase terminal, FIG. 7 is a drawing illustrating the phase 1 terminal, and FIG. 8 is a plan view of the phase 1 terminal illustrated in FIG. It is a figure.

Hereinafter, the three phase terminals 120 will be referred to as a first phase terminal 120A, a second phase terminal 120B, and a third phase terminal 120C, respectively. With reference to FIGS. 4, 6 to 8, each of the three phase terminals 120 includes a second body 121 and a plurality of second connecting portions 122. The second body 121 has an arc shape. The second connecting portion 122 extends from the second body 121. The second connecting portion 122 includes a horizontal portion 122a, a vertical portion 122b, and a terminal 122c. The horizontal portion 122a is bent inward from both ends of the second body 121. The vertical portion 122b is bent vertically upward from the horizontal portion 122a. The terminal 122c is bent from the vertical portion 122b. The terminal 122c is a portion connected to the coil 31.

Further, the second connecting portion 122 includes a first branch portion 122d, a second branch portion 122e, and a terminal 122f. The first branch portion 122d is branched upward from the horizontal portion 122a. The second branch portion 122e is branched upward from the first branch portion 122d again. The terminal 122f is bent upward from the second branch portion 122e. An external power supply is connected to the terminal 122f.

The second body 121 may include three second connecting portions 122. Of the three second connecting portions 122, two second connecting portions 122 are arranged at both ends of the second body 121, and the remaining one second connecting portion 122 is arranged at both ends of the second body 121. It may be placed between the two second connecting portions 122. At this time, the second connecting portions 122 arranged at both ends of the second body 121 include a horizontal portion 122a for connecting the coils 31 and a vertical portion 122b. Terminal 122c can be included. And. The second connecting portion 122 arranged between the two second connecting portions 122 includes a first branch portion 122d, a second branch portion 122e, and a terminal 122f for connecting an external power source.

The cross section of the second body 121 of the phase terminal 120 has a second width t2 in the axial direction larger than the first width w2 in the radial direction when BB in FIG. 7 is used as a reference. The phase terminal 120 is a terminal 100 in a vertically erected form. The shape of such a phase terminal 120 is for reducing scrap.

With reference to FIG. 6, the development pattern 2 is illustrated on the raw material 1 which is a sheet metal member. The first member 2a having a long strip shape in the unfolding pattern 2 corresponds to the second body 121. The first member 2a is bent to form an arc-shaped second body 121. The second member 2b is arranged in a branched form from both ends of the first member 2a. The second member 2b is bent to become the terminal 122c. Then, the third member 2c is arranged in a form branched from the first member 2a. The third member 2c corresponds to the first branch portion 122d, the fourth member 2d corresponds to the second branch portion 122e, and the fifth member 2e is bent to become the terminal 122f.

Such a development pattern 2 has a structure in which very little scrap is discharged because the first member 2a has a strip shape when considering the shape of the rectangular raw material 1. Considering that the motor includes three phase terminals 120, the phase terminal 120 having such a structure has an advantage that scrap is greatly reduced and the manufacturing cost of the motor is reduced.

As described above, the neutral terminal 110 has a second width t1 smaller than the first width w1 in the radial direction, and the phase terminal 120 has a second width t2 larger than the first width w2, but the present invention is limited thereto. However, the neutral terminal 110 may have a second width t1 larger than the first width w1, and the phase terminal 120 may have a second width t2 smaller than the first width w1.

On the other hand, the first width w1 of the neutral terminal 110 can be the same as the second width t2 of the phase terminal 120. The second width t1 of the neutral terminal 110 can be the same as the first width w2 of the phase terminal 120. Alternatively, the axial width t3 of the first connecting portion 112 of the neutral terminal 110 may be the same as the radial width w3 of the second connecting portion 122 of the phase terminal 120.

Referring to FIG. 8, in the case of the first phase terminal 120A, the second connecting portion 122 arranged on one side with reference to the virtual straight line L passing through the center P1 of the second body 121 and the center C of the first orbit O1. The terminal 122c of the second connecting portion 122 and the terminal 122c of the second connecting portion 122 arranged on the other side may be arranged so as to be asymmetrical.

FIG. 9 is a perspective view showing the second phase terminal, and FIG. 10 is a plan view of the second phase terminal shown in FIG.

Referring to FIGS. 9 and 10, the second phase terminal 120B also has the horizontal portion 122a, the vertical portion 122b, the terminal 122c, the first branch portion 122d, and the second branch portion 122e, like the first phase terminal 120A. And the terminal 122f is included. Since the description of this is the same as that of the first phase terminal 120A, the description of this is omitted. However, in the case of the second phase terminal 120B, the length of the second body 121, the shape and size of the horizontal portion 122a, and the like are different from those of the first phase terminal 120A.

Then, in the case of the second phase terminal 120B, with reference to the reference line passing through the width center P2 of the second body 121 and the curvature center C of the second body 121, the terminal 122c of the second connecting portion 122 arranged on one side. The terminals 122c of the second connecting portion 122 arranged on the other side may be arranged symmetrically.

FIG. 11 is a perspective view showing the phase 3 terminal, and FIG. 12 is a plan view of the phase 3 terminal shown in FIG.

With reference to FIGS. 11 and 12, the third phase terminal 120C also has the horizontal portion 122a, the vertical portion 122b, the terminal 122c, the first branch portion 122d, and the second branch portion 122e, like the first phase terminal 120A. And the terminal 122f is included. Since the description of this is the same as that of the first phase terminal 120A, the description of this is omitted. However, in the case of the third phase terminal 120C, the length of the second body 121, the form and size of the horizontal portion 122a, and the like are different from those of the first phase terminal 120A. The positions of the first branch portion 122d, the second branch portion 122e, and the terminal 122f are different in the third phase terminal 120C. In the case of the third phase terminal 120C, unlike the first phase terminal 120A and the second phase terminal 120B in which the first branch portion 122d is branched from the second connecting portion 122, the first branch portion 122d is the upper surface of the second body 121. Branched from.

Then, in the case of the third phase terminal 120C, the terminal 122c of the second connecting portion 122 arranged on one side with reference to the reference line passing through the width center P3 of the second body 121 and the curvature center C of the second body 121. The terminals 122c of the second connecting portion 122 arranged on the other side may be arranged symmetrically.

Referring to FIGS. 2 and 4, the neutral terminal 110 is generally arranged on one side of the fuselage 41, and the phase terminal 120 is arranged on the other side of the fuselage 41. The plurality of terminals 122c are arranged at the same position in the radial direction with respect to the center of the bus bar. The first orbit O1 and the second orbit O2 will be used as a reference for arranging the terminal 100. The first orbit O1 and the second orbit O2 have the center C of the bus bar 40 concentrically. The first orbit O1 is arranged inside the second orbit O2.

The first body 111 of the neutral terminal 110 is arranged in the second orbit O2. The second body 121 of the second phase terminal 120B is also arranged in the second orbit O2. Then, the second body 121 of the first phase terminal 120A and the second body 121 of the third phase terminal 120C are arranged in the first orbit O1. The terminal 122c of the neutral terminal 110 is arranged between the first orbit O1 and the second orbit O2. The terminal 122c of the phase terminal 120 is also arranged between the first orbit O1 and the second orbit O2.

The radial length R1 from the center C of the bus bar 40 to the first body 111 of the neutral terminal 110 may be larger than the radial lengths R2 and R3 of the phase terminal 120 to the second body 121.

Further, the terminal 122c of any one phase terminal 120 may be arranged between the two terminals 122c of the other phase terminal 120. For example, any one of the two terminals 122c of the first phase terminal 120A as shown in H2 of FIG. 4 is between the two terminals 122c of the third phase terminal 120C as shown in H1 of FIG. Can be placed. In such a structure and arrangement of the phase terminal 120, all the terminals 122c are in the circumferential direction between the first orbit O1 and the second orbit O2 in a state where the shapes of the neutral terminal 110 and the phase terminal 120 are different from each other. It is for arranging so as to be aligned along.

As described above, the details of the motor according to the preferred embodiment of the present invention have been described with reference to the attached drawings.

It should be understood that one embodiment of the invention described above is exemplary in all respects and is not limiting, and the scope of the invention will be described below rather than the detailed description described above. Will be indicated by the claims made. And, as well as the meaning and scope of the claims, all the modifiable or deformable forms derived from the equivalent concept should be construed to be included in the scope of the present invention.

Claims (11)

housing;
A stator arranged in the housing;
Rotor arranged in the stator;
Includes a shaft coupled to the rotor; and a busbar located on the stator and having multiple terminals.
The plurality of terminals include a neutral terminal and a plurality of phase terminals.
The neutral terminal includes a first body having a first radial width larger than a second axial width and a plurality of first connecting portions extending from the first body.
The phase terminal is a motor including a second body having a first radial width smaller than a second axial width and a plurality of second connecting portions extending from the second body. The first width of the neutral terminal is the same as the second width of the phase terminal.
The motor according to claim 1, wherein the second width of the neutral terminal is the same as the first width of the phase terminal. The motor according to claim 1, wherein the width of the first connecting portion of the neutral terminal in the axial direction is the same as the width of the second connecting portion of the phase terminal in the radial direction. In the first orbit and the second orbit where the first body or the second body is arranged with reference to the center of the bus bar,
The plurality of phase terminals include a first phase terminal, a second phase terminal, and a third phase terminal.
The second body of the first phase terminal and the second body of the third phase terminal are arranged on the first orbit.
The motor according to claim 1, wherein the second body of the second phase terminal is arranged on the second orbit. With reference to the center of the bus bar
The motor according to claim 4, wherein the first track is arranged inside the second track. The motor according to claim 5, wherein the first body of the neutral terminal is arranged on the second track. The second connecting portion includes a horizontal portion extending from one side of the second body, a vertical portion extending upward from a part of the horizontal portion, and a terminal protruding from a part of the vertical portion.
The motor according to claim 4, wherein the terminal is coupled to the coil of the stator. The terminal of any one of the first phase terminal, the second phase terminal, and the third phase terminal is arranged between the two terminals of the other phase terminal in the circumferential direction. The motor according to claim 7. 7. The two terminals of the first phase terminal are arranged so as to be asymmetric with respect to a virtual straight line connecting the center of the first orbit and the center of the second body of the first phase terminal. The motor described in. 9. The two terminals of the second phase terminal are arranged symmetrically with respect to a virtual straight line connecting the center of the first orbit and the center of the second body of the second phase terminal. The motor described in. The motor according to claim 3, wherein the radial length from the center of the bus bar to the first body of the neutral terminal is larger than the radial length of the phase terminal to the second body.

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